JP2007094806A - Image display method, image display apparatus, and image display program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem, wherein when displaying character image data in an image in which video image data and character image data are mixed by applying expansion/reduction to an arbitrary size, processing becomes complicated and requires time, if a character area and a video image area are composited and displayed after they are processed individually by applying scaling factors changed arbitrarily. <P>SOLUTION: An image split section 12 splits an image, based on image signals in which the video image data and the character image data are mixed is split into the arbitrary number of lattices. An image identification section 13 identifies a character area lattice which is a lattice composed of character image data, and an image area lattice which is a lattice composed of video image data. A lattice point processing section 14 moves by a predetermined distance for each lattice point of the character area lattice out of lattices split by the image split section 12 to the direction, to expand or reduce the lattice to the arbitrary size, and performs movement control to each lattice point of the image area lattice, according to movement amount of each lattice point of the character area lattice. They are made to be created as a display image by a display image creation section 15. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image display method, an image display apparatus, and an image display program, and in particular, an image for displaying character image data in an image in which video image data and character image data are mixed and enlarged or reduced to an arbitrary size. The present invention relates to a display method, an image display device, and an image display program.

  2. Description of the Related Art Characters such as movie subtitles and news program explanations are often inserted into displayed images in video content such as television video and video video. However, since the size of characters in such an image cannot be enlarged or reduced to an arbitrary size on the receiving side, there is a problem that the size of the characters cannot be made arbitrary.

  Therefore, as an invention to solve such a problem, when enlarging the character image data displayed as an image, the enlargement ratio is switched depending on the resolution and operation method of the display panel, and the processed character image is processed. An image display method is disclosed in which data is synthesized and displayed on the original video image data including the character image data (see, for example, Patent Document 1).

  In addition, when video image data and character image data (display data) constituting a single image are input in a separate format, the enlargement / reduction ratio is arbitrarily changed between the character area and the video area. An image display method for performing processing and then combining and displaying the respective data has been conventionally disclosed (see, for example, Patent Document 2).

  Further, in Patent Document 2, even when video image data and character image data are not input in a separated format, the input image is separated into video image data and character image data. There is also disclosed a method of performing enlargement / reduction processing by arbitrarily changing the enlargement / reduction ratio for character image data, and then combining the respective data.

  Furthermore, when a television signal in which video image data and character image data are mixed is input, the video image data and the character image data are reliably separated, and after the respective enlargement / reduction, the data An image display method for displaying a character image in a size that is easy to read by combining and outputting has been disclosed (for example, see Patent Document 3).

JP-A-8-9281 JP 2001-134262 A JP 2003-198975 A

  However, the conventional image display method described in Patent Document 1 is an image display method in the case where a letterbox type image in which subtitles are displayed in a blank portion is input. Therefore, characters in the image cannot be enlarged / reduced. As a result, there is a problem that the adaptation range is narrow.

  In the conventional image display methods described in Patent Document 2 and Patent Document 3, video image data and character image data are separately processed as individual data, and then the two data after the individual processing are combined. Therefore, there is a problem that the process is complicated and takes a long time, and the entire apparatus tends to be large. Another problem is that processing cannot be performed when the distinction between video image data and character image data is ambiguous.

  The present invention has been made in view of the above points, and provides an image display method, an image display apparatus, and an image display program that can process video image data and character image data separately without processing them separately. With the goal.

  Another object of the present invention is to provide an image display method, an image display device, and an image display program that can be processed even when the identification of video image data and character image data is ambiguous.

In order to achieve the above object, the image display method of the present invention separates video image data and character image data from an input image signal, enlarges or reduces the character image data to an arbitrary size, and An image display method for outputting a recombined recombined image signal,
A first step of dividing an image based on an input image signal into an arbitrary number of grids, and each of the divided grids is a character area grid that is a grid made up of character image data, or is made up of video image data A second step of identifying whether the image area grid is an image area grid, and moving each grid point of the character area grid by a predetermined distance in a direction of enlarging or reducing to a grid of an arbitrary size, A third step of controlling the movement of each grid point according to the amount of movement of each grid point of the character area grid, and a character image by the character area grid after the movement of each grid point by the third step And a fourth step of generating, as a recombined image signal, image data composed of a video image formed by the image area lattice after each lattice point is controlled to move.

In order to achieve the above object, the image display device of the present invention separates video image data and character image data from an input image signal, and enlarges or reduces the character image data to an arbitrary size. An image display device that outputs a recombined image signal recombined with data,
Image dividing means for dividing an image based on an input image signal into an arbitrary number of lattices, and each divided lattice is a character region lattice that is a lattice composed of character image data or composed of video image data The image identification means for identifying whether the image area grid is a grid, and each grid point of the character area grid is moved by a predetermined distance in the direction of enlargement or reduction to a grid of an arbitrary size, and each of the image area grid Grid point processing means for controlling the movement of the grid points in accordance with the amount of movement of each grid point of the character area grid, a character image by the character area grid after the movement of each grid point by the grid point processing means, and And display image creating means for generating, as a recombined image signal, image data composed of a video image by an image area grid after the grid points are controlled to move.

  In order to achieve the above object, an image display program of the present invention is characterized by causing a computer to execute each step of the above image display method of the present invention.

  In the above image display method, image display apparatus, and image display program of the present invention, video image data and character image data are separated from the input image signal, and the character image data is enlarged or reduced to an arbitrary size to produce a video image. When outputting the re-synthesized image signal re-synthesized with the data, the image by the input image signal is divided into an arbitrary number of lattices, and each divided lattice is a character region lattice made up of character image data. Or an image area grid that is a grid composed of video image data, and each grid point of the character area grid is moved by a predetermined distance in the direction of enlarging or reducing to an arbitrarily sized grid At the same time, by controlling the movement of each grid point of the image area grid according to the amount of movement of each grid point of the character area grid, the character identification processing of the character image data and the video image data The image information identification processing is not performed separately (in other words, the character image data and the video image data are not processed as separate data), but the character region data and characters including the characters are included. It is treated as image area data that is not.

  According to the present invention, when an image based on character image data in an input image signal in which video image data and character image data are mixed is enlarged or reduced to an arbitrary size, character image data and video image data are displayed. Is not processed as individual data, but is simply a character area data that includes characters or an image area data that does not include characters. Since the lattice point moving process is performed, it is possible to perform a process at a higher speed than in the prior art.

  Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic block diagram of a first embodiment of an image display apparatus according to the present invention. In the figure, an image input unit 10 inputs an image signal in which video image data and character image data are mixed. When the input image signal is an interlaced television signal such as the NTSC system or PAL system, the image input unit 10 processes the interlaced image signal progressively and converts it to digital data, and inputs the input image to the storage unit 11. Record as data 111. Alternatively, an interlaced image signal may be converted into digital data in the interlaced format and recorded as input image data 111 in the storage unit 11.

  When the input image signal is digital data, the image input unit 10 records the input digital data as it is as the input image data 111 in the storage unit 11. At this time, if the input digital data is data subjected to data compression, the decompressed and restored image data is recorded as the input image data 111 in the storage unit 11.

  The storage unit 11 includes an image data storage part for recording the input image data 111 described above, a storage part for a division number 112 necessary for dividing the image data stored in the storage unit 11 by an image dividing unit 12 described later, and a storage unit described later. The storage part of the enlargement / reduction ratio 113 for determining how much the character area identified by the image identification part 13 is enlarged / reduced by the lattice point processing part 14 to be described later, the character area lattice processed by the lattice point processing part 14 A storage portion of initial parameters 114 such as parameters for setting how to move lattice points in other areas with respect to the movement of the points, and lattice point coordinate information 115 of the image lattice divided by the image dividing unit 12 are stored. It has a storage part, a storage part of image character identification information 116 which is identification information for each lattice identified by the image identification part 13, and a storage part of output image data 117.The division number 112, the enlargement / reduction ratio 113, and the initial parameter 114 are stored in advance in the storage unit 11 as arbitrary values of the user by a data input unit (not shown).

  The image dividing unit 12 reads one piece of image data from the input image data 111 stored in the storage unit 11 and divides the image data into a grid according to the number of image divisions 112 read from the storage unit 11. Then, the lattice point coordinate information 115 obtained thereby is recorded in the storage unit 11.

  Based on the input image data 111 and the lattice point coordinate information 115 read from the storage unit 11, the image identification unit 13 determines whether each lattice portion indicated by the lattice point coordinate information 115 in the image data is a character region or an image region. Identify if there is. As an identification method, for example, as disclosed in Japanese Patent Application Laid-Open No. 60-116081, an area having a smaller grid is created, and density gradients are detected in the horizontal and vertical directions of the image data in each area. And calculating the histogram, calculating the frequency distribution of the calculated histogram and comparing it with a predetermined threshold value to extract a character candidate area, and whether it is a character area according to the arrangement relationship of the extracted character candidate areas The image character identification information 116 is recorded in the storage unit 11.

  The grid point processing unit 14 includes initial parameters such as input image data 111 stored in the storage unit 11, grid point coordinate information 115, image character identification information 116, character area enlargement / reduction ratio 113, and image area grid point control parameters. 114 is read, and it is determined that character information is included by image identification by the image identification unit 13 when the image of the input image data 111 is divided into lattices in the read input image data 111 (that is, the image of the input image data 111 is divided into lattices). The lattice point in the lattice is moved by the amount of movement determined by the initial parameter 114, and the image identification unit 13 when the image area lattice (that is, the image of the input image data 111 is divided into lattices) according to the amount of movement. A grid point determined to contain image information by image identification), and the grid point coordinate information 115 after the movement is stored in the storage unit. Record to 1.

  The display image creation unit 15 creates output image data based on the grid point coordinate information 115 and the input image data 111 read from the storage unit 11 and records them in the storage unit 11. The image output unit 16 outputs the output image data 117 stored in the storage unit 11 to the outside.

  Next, how image data is processed according to the first embodiment of the image display apparatus and the image display method of the present invention will be specifically described with reference to FIGS. FIG. 2 is a flowchart of the first embodiment of the image display method according to the present invention, and FIG. 3 is an image data transition diagram showing how image data is processed according to the flowchart of FIG.

  First, input image data 111 input from the image input unit 10 in FIG. 1 and stored in the storage unit 11 is read as an input video image, and is converted into a grid having an arbitrary number of grids by the image dividing unit 12 in FIG. Divided (step S11 in FIG. 2). Here, an example of an input video image based on the input image data 111 is shown in FIG. 3A, and this is divided into, for example, 16 in the horizontal direction by the image dividing unit 12 as shown in FIG. Into 12 grids.

  Subsequently, with respect to each of the 16 horizontal image images and 12 vertical image images obtained by the division in step S11, the image identification unit 13 shown in FIG. The character area is identified by the image data, and the identification result is associated with the position coordinates of the lattice and stored as image character identification information 116 in the storage unit 11 (step S12 in FIG. 2). FIG. 3C shows a case where all the character image data in the input image data are correctly identified as the character areas 21 to 23. The image area and the character area are identified by a known method disclosed in Japanese Patent Application Laid-Open No. 60-116081, and the identification method itself is not the gist of the present invention. Detailed description is omitted.

  Next, the grid point processing unit 14 in FIG. 1 enlarges or reduces each grid point of the grid of the character area identified in step S12 so that the grid becomes a grid of an arbitrary size based on the initial parameter 114. The position is moved (step S13 in FIG. 2). FIG. 3D shows a state in which the lattice points are moved in step S13. FIG. 3D shows an example of movement in which the respective grid sizes of the character areas 24 to 26 are enlarged so as to be 1.2 times the respective grid sizes of the original character areas 21 to 23 in FIG. .

  Here, an example of movement of each lattice size will be specifically described. As an example, for simplification of description, as shown in FIG. 4, a total of nine grids of 3 × 3 each of 3 × 3 will be described. The grid points are 16 in total as indicated by black circles 3301 to 3316. It becomes a piece. White circles indicate grid points after movement, which will be described later. The coordinates of these 16 grid points are (0, 0) at the upper left grid point 3301, (1, 0) at the right grid point 3302, and (2) at the right grid point 3303 (2). , 0), and the right grid point 3304 is (3, 0), the grid point 3305 is (0, 1), the grid point 3306 is (1, 1), It is assumed that the point 3307 is (2, 1) and the lattice point 3308 is (3, 1).

  Similarly, the coordinates of the grid points in the next row are (0, 2) for the grid point 3309, (1, 2) for the grid point 3310, (2, 2) for the grid point 3311, The point 3312 is (3, 2), and the coordinates of the grid points in the last row are set such that the grid point 3313 is (0, 3), the grid point 3314 is (1, 3), and the grid point 3315 is from left to right. Assume that (2, 3) and the lattice point 3316 is (3, 3).

Here, if one grid at the upper left is enlarged by 1.2 times, the coordinates of the grid point 3301 do not move at (0, 0), but the grid point 3302 is at the coordinates (1.2, 0). The grid point 3305 moves to the coordinates (0, 1.2), and the grid point 3306 moves to the coordinates (1.2, 1.2). There are various algorithms for how to move the other 12 lattice points, but when distributing evenly, (3.0-1.2) /2=0.9
Therefore, the lattice point 3303 moves to the coordinates (2.1, 0), and the lattice point 3304 remains at the coordinates (3, 0). Also,
(1.2-1.0) /2=0.1
Therefore, the lattice point 3307 moves to the coordinates (2.1, 1.1), and the lattice point 3308 remains (3, 1). Similarly, the lattice point 3309 moves to the coordinates (0, 2.1), and the lattice point 3310 moves to the coordinates (1.1, 2.1). Other lattice points 3311 are (2, 2), lattice points 3312 are (3, 2), lattice points 3313 are (0, 3), lattice points 3314 are (1, 3), and lattice points 3315 are (2, 2). 3) The lattice point 3316 remains (3, 3) and does not move.

  Further, if the algorithm is not uniform and is absorbed by the next grid, the grid point 3302 has coordinates (1.2, 0), the grid point 3305 has coordinates (0, 1.2), and the grid point 3306 has Moves to the coordinates (1.2, 1.2), but the other grid points do not move.

  The center of the enlargement / reduction of the character area is a coordinate obtained by averaging the lattice point coordinate positions unless the lattice is in contact with the four sides of the character area. Also, when the grid touches the four sides of the character area, it distinguishes between touching two sides and touching only one side. When touching two sides, the intersection of the two sides If only one side is in contact, the center is the coordinate obtained by averaging the grid point coordinate positions on the contact side.

  Subsequently, the grid point processing unit 14 of FIG. 1 performs each grid of the image area grid other than the grid points in the character areas 24 to 26 according to the grid point movement amount of the text area grid processed in step S13 of FIG. The point is moved (step S14 in FIG. 2). FIG. 3E shows an example in which the grid points of the image area grid other than the grid points in the character areas 24 to 26 are moved from the state shown in FIG. In FIG. 3E, among the grid points of the image area grid other than the grid points in the character areas 24-26, the grid point coordinates close to the horizontal position are averaged, and the grid point coordinates close to the vertical position are averaged. Shows the case.

  That is, at each grid point of the image area grid, grid points in the same column as the grid area of the character area grid are aligned as the same x coordinate value, and grid points in the same row are aligned as the same y coordinate value. However, for a column with a plurality of different x-position character area grid points, the sandwiched sections are averaged. For example, if there is a lattice point of two image area lattices sandwiched between x = 3.2 and x = 4.1, it is 0.3 (= (4.1-3.2) / 3). Thus, the respective x coordinates are 3.5 and 3.8. The grid points in the section not sandwiched are set to the same x coordinate as the closest grid point. The y-coordinate is similarly performed.

  Note that the method of moving the lattice points is not limited to this, and all the lattices may be moved closer to a square, or the lattice points of the image region may not be moved at all. However, even when the character area is not moved at all, the lattice points that are in contact with both the image area and the character area move as the character area moves.

  Subsequently, the image generation unit 15 in FIG. 1 creates image data of an image as shown in FIG. 3F based on the final positions of the lattice points moved in steps S13 and S14 in FIG. 2 (FIG. 2). Step S15). That is, in the processing up to S14, the respective grid point coordinates of the character area grid and the image area grid are obtained, and thereafter, based on the input image data and the movement amount of the grid point coordinates, a bilinear filter, a bicubic filter, etc. Image interpolation processing is performed to generate an image with an enlarged character area grid.

  Here, when only the image of the character region is compared with the input image shown in FIG. 3A and the generated image shown in FIG. 3F, as shown in FIG. The upper characters are the characters of the generated image, and the lower characters are the characters of the input image. Here, the characters of the generated image are enlarged compared to the characters of the input image. The image data generated in this way is temporarily stored in the storage unit 11, and then output as image data to be displayed by the image output unit 16 in FIG. 1 (step S16 in FIG. 2).

  As described above, in an image display device capable of enlarging or reducing character image data to an arbitrary size in a video image in which video image data and character image data are mixed, conventionally, video image data and character image data are individually separated. This processing is performed separately as data, and for character image data, it was recorded and processed up to what the characters were, and then combined with the processed video image data In this form, the grid points of the character area grid are moved, and the movement of the grid points of the image area grid is only controlled accordingly, and the character image data can only be determined as the data of the character area containing characters. No extra storage medium capacity is used, and the amount of information handled is small, so that high-speed processing can be performed.

  Next, an image display method and an image display apparatus according to a second embodiment of the present invention will be described. The configuration of the image display device of the present embodiment is the same as that of the first embodiment shown in FIG. 1, but in this embodiment, the image character identification information 116 stored in the storage unit 11 is identified. By adding a code, the character area can be enlarged or reduced even when the distinction between the character area and the image area is ambiguous. Here, as the identification code, for example, “1” in the case of a character area, “2” in the case where the possibility of the character area is large, “3” in the case where the possibility of the character area is small, In this case, it is “4”.

  Next, how image data is processed according to the second embodiment of the image display apparatus and image display method of the present invention will be described with reference to FIGS. 1 and 5 to 7. To do. FIG. 5 is a flowchart of the second embodiment of the image display method according to the present invention, and FIGS. 6 and 7 are image data transition diagrams showing how the image data is processed according to the flowchart of FIG.

  First, the input image data 111 input from the image input unit 10 of FIG. 1 and stored in the storage unit 11 is read as an input video image, and is divided into arbitrary grid shapes by the image dividing unit 12 of FIG. (Step S21 in FIG. 5). Here, an example of the input video image based on the input image data 111 is shown in FIG. 6A. This is divided into 16 pieces in the horizontal direction by the image dividing unit 12 as shown in FIG. 6B, for example, in the vertical direction. Into 12 grids.

  Subsequently, for each of the 16 grids in the horizontal direction and 12 grids in the vertical direction obtained by dividing into grids in step S21, the image identification unit 13 in FIG. Whether the character area is small or image area is identified, and an identification code corresponding to the identified contents is stored in the storage unit 11 as image character identification information 116 in association with the position coordinates of the identified grid. (Step S22 in FIG. 5).

  Here, as a method for identifying the above four regions, for example, a known method described in Japanese Patent Application Laid-Open No. 60-116081 can be used. This known method divides an image into small regions, detects a density gradient in each of the small regions in the horizontal direction and the vertical direction, calculates a histogram, calculates the variance of the frequency of the calculated histogram, and calculates a predetermined value. This is a method of extracting a character candidate area by comparing with a threshold value, and extracting the number of characters of the character image included in the character area and the character image data based on the arrangement relationship of the extracted character candidate areas. As described above, the identification code is “1” when the identification target grid is a character region, “2” when the character region possibility is large, and “2” when the character region possibility is small. 3 ”and“ 4 ”in the case of an image area.

  FIG. 6C shows the identification result obtained in step S22 together with the input image divided in a grid pattern. In the example shown in FIG. 6C, a grid including an image of “8:15” representing the time is identified as a character area (identification code: 1) 31, and a grid including an image of “3-B” is defined as a character area. Identify a region having a high possibility (identification code: 2) 32, identify a lattice including an image of “greeting firmly” as a region (identification code: 3) 33 having a low possibility of character region, and identify lattices in other images. This is a case where it is identified as an image region (identification code: 4), and the character image of the input character image data is correctly identified as a character region.

  Subsequently, the lattice point processing unit 14 in FIG. 1 reproduces the initial parameters 114 that are arbitrarily set and stored in advance in the storage unit 11 and the image character identification information 116 stored in step S22, and the image characters are reproduced. Based on the initial parameter, which value of the identification code added to the identification information 116 is to be enlarged / reduced is determined (step S23 in FIG. 5).

  FIG. 7 shows that the original grid size is 1. for the grids whose identification code values are “1” and “2” (that is, the grids in the character area and the grids in the area where the possibility of the character area is high). The figure in the case where it is determined that the enlargement process is performed so as to be 1 time is shown. Subsequently, the lattice point processing unit 14 moves each lattice point of the enlargement / reduction processing target lattice determined in step S23 to a position where the lattice enlarges / reduces in the same manner as in the first embodiment. (Step S24 in FIG. 5). Thereby, each lattice point of the lattice in the character region 34 to be enlarged in the image shown in FIG. 7A and each lattice point of the lattice in the region 35 having a large character region possibility are shown in FIG. ), The regions 36 and 37 are formed by moving to positions enlarged by 1.1 times, respectively.

  The center of enlargement / reduction is a coordinate obtained by averaging the grid point coordinate positions unless the grid is in contact with the four sides of the target region. When the grid touches the four sides of the target area, it distinguishes between touching two sides and touching only one side. When touching two sides, the intersection of the two sides is the center. In the case where only one side is in contact, the center is the coordinate obtained by averaging the grid point coordinate positions on the side in contact.

  Subsequently, the lattice point processing unit 14 selects a lattice other than the enlargement / reduction processing target lattice (here, the character region possibility small region) according to the lattice point movement amount of the enlargement / reduction processing target lattice processed in step S24. And the image area) are moved (step S25 in FIG. 5). Accordingly, in the example of FIG. 7, as shown in FIG. 7C, lattices other than the lattices in the character region 36 and the character region possibility region 37 shown in FIG. It moves by the movement amount corresponding to the lattice movement amount by the double enlargement process. FIG. 7 shows a case where grid points of grids other than the enlargement / reduction processing target grid are averaged at close grid point coordinates at the horizontal position, and close grid point coordinates are averaged at the vertical position.

  The method of moving the lattice points is not limited to this, and all the lattices may be moved closer to a square, or the lattice points of the lattices other than the enlargement / reduction processing target lattice may not be moved at all. However, even if not moved at all, the grid points that touch both the enlargement / reduction processing target grid and the grid other than the enlargement / reduction processing target grid move as the character area moves.

  Subsequently, the image generation unit 15 in FIG. 1 creates image data of an image as shown in FIG. 7D based on the final positions of the lattice points moved in steps S24 and S25 in FIG. 5 (FIG. 5). Step S26). The image data generated in this way is temporarily stored in the storage unit 11 and then output as output image data 117 to be displayed by the image output unit 16 in FIG. 1 (step S27 in FIG. 5). .

  As described above, according to the present embodiment, in an image display device capable of enlarging or reducing character image data to an arbitrary size in a video image in which video image data and character image data are mixed, characters in an input video image are displayed. Even if the distinction between the area and the image area is ambiguous, each area is identified as a character area possibility and a character area possibility small area, and the character area possibility large area is also determined as a character area. The character area can be enlarged. In the case of reduction, the same procedure as in the case of enlargement is performed.

  Note that the present invention is not limited to the above embodiment. For example, in the above embodiment, one image has been described. Is also possible. Furthermore, although the image display apparatus and the image display method have been described in the above embodiments, the present invention is intended to operate the image display apparatus according to the above-described embodiments and a device that is sustained with the image display apparatus or the system. A computer program for realizing the image display method of the above-described embodiment on a computer, and an information storage medium such as a CD (Compact Disc) and a DVD (Digital Versatile Disc) on which the computer program is recorded are also included.

  The above computer program may be taken into the computer from an information recording medium, may be distributed via a communication network, taken into the computer, or may be incorporated into the computer. All modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  It can be widely used in an image display device, an image display method, an information storage medium, and an image display program capable of enlarging / reducing character data in a video image in which image data and character data are mixed. .

1 is a schematic block diagram of an embodiment of an image display device of the present invention. It is a flowchart of 1st Embodiment of this invention image display method. It is a figure which shows an example of the image data transition according to the flowchart of FIG. It is explanatory drawing of an example of the movement of a lattice point. It is a flowchart of 2nd Embodiment of this invention image display method. FIG. 6 is a diagram (part 1) illustrating an example of image data transition according to the flowchart of FIG. 5; FIG. 6 is a second diagram illustrating an example of image data transition according to the flowchart of FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image input part 11 Memory | storage part 12 Image division part 13 Image identification part 14 Grid point process part 15 Display image creation part 16 Image output part 111 Input image data 112 Division | segmentation number 113 Enlargement / reduction ratio 114 Initial parameter 115 Grid point information 116 Image character Identification information 117 Image data for output

Claims (3)

An image display method of separating video image data and character image data from an input image signal, and outputting the recombined image signal recombined with the video image data by expanding or reducing the character image data to an arbitrary size. There,
A first step of dividing an image by the input image signal into an arbitrary number of grids;
A second step of identifying whether each of the divided grids is a character area grid that is a grid configured by the character image data or an image area grid that is a grid configured by the video image data. When,
The grid points of the character area grid are moved by a predetermined distance in a direction to enlarge or reduce the grid points of an arbitrary size, and the grid points of the image area grid are moved by the grid points of the character area grid. A third step of controlling movement according to
Image data consisting of a character image by the character area grid after movement of each grid point in the third step and a video image by the image area grid after movement control of each grid point is re-executed. And a fourth step of generating as a composite image signal. An image display device that separates video image data and character image data from an input image signal, and outputs a recombined image signal re-synthesized with the video image data by expanding or reducing the character image data to an arbitrary size. There,
Image dividing means for dividing the image by the input image signal into an arbitrary number of grids;
Image identifying means for identifying whether each of the divided grids is a character area grid that is a grid composed of the character image data or an image area grid that is a grid composed of the video image data; ,
The grid points of the character area grid are moved by a predetermined distance in a direction to enlarge or reduce the grid points of an arbitrary size, and the grid points of the image area grid are moved by the grid points of the character area grid. Grid point processing means for controlling movement according to
Image data composed of a character image by the character area grid after the movement of each grid point by the grid point processing means and a video image by the image area grid after the movement of each grid point is re-executed. An image display device comprising: a display image creating means for generating a composite image signal. An image display method for separating video image data and character image data from an input image signal, expanding or reducing the character image data to an arbitrary size, and outputting a recombined image signal recombined with the video image data A program to be executed by a computer,
In the computer,
A first step of dividing an image by the input image signal into an arbitrary number of grids;
A second step of identifying whether each of the divided grids is a character area grid that is a grid configured by the character image data or an image area grid that is a grid configured by the video image data. When,
The grid points of the character area grid are moved by a predetermined distance in a direction to enlarge or reduce the grid points of an arbitrary size, and the grid points of the image area grid are moved by the grid points of the character area grid. A third step of controlling movement according to
Image data consisting of a character image by the character area grid after movement of each grid point in the third step and a video image by the image area grid after movement control of each grid point is re-executed. And a fourth step of generating as a composite image signal.

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